Asked by LadyPhantomhive

To solve the following system of equations by elimination, which operation would you perform first?
234x + 65y = 219
1225x + 65y = 427
F. addition
G. subtraction
H. Multiplication
I. division
Answered by LadyPhantomhive
I think it is I. Division
Answered by Ms. Sue
No. Study this site and memorize PEMDAS.

http://www.mathsisfun.com/operation-order-pemdas.html
Answered by LadyPhantomhive
Oh okay so its multiplication?
Answered by Ms. Sue
Yes.

Don't forget PEMDAS!
Answered by LadyPhantomhive
Thank you.
Answered by Ms. Sue
You are welcome.
Answered by Damon
I would subtract first to eliminate y
65 y is in both
Answered by Ms. Sue
Oops! Thanks, Damon. You're right. I goofed.
Answered by Reiny
Since both equations contain 65y,
subtractions would make the y's go away

subtract the first equation from the 2nd to get
991x = 208
x = 208/991

sub back into the first:
234(208/991) + 65y = 219
65y = 219 - 48672/991 = 168357/991
y = 168357/64415
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